Shock-absorber.



Patented May 20, 1913.

INVENTOR J. BULAND.

SHOCK ABSORBER. 7 APPLICATION FILED JULY 3.1912.

FIGJ.

- resident of Pittsburgh, in the county of Alu per portion of the double absorb r in side sisting of a cylindrical body or shoe 2 of .of the form of absorber shown in F ig. 5,

JOSEPH ."BOLAND, OF PITTSBUR GH, PENNSYLVANIA.

SHOCK-ABSORBER.

Specification of Letters Patent.

Application filed July 3, 1912.

' Patented May 20, 1913.

Serial No. 707,444.

To all whom it may concern Be it known that I, Josnrn ROLAND, a

leghepy and State of Pennsylvania, have invented certain new and useful Improvements in Shock-Absorbers, 0f which the following is a specification. r

The object of this inventionis to provide simple and efiieient shock absorbing means adapted for either light or heavy vehicles, the device preventing severe shocks or jars from bein communicated to the vehicle body and relieving the springs of breakin strains.

In the accompanying drawings, igure 1 is an elevation of a shockabsorber of double form in position between the frame and spring of the vehicle. Fig. 2 illustrates the e evation with the end cap detached, and the lower portion of the absorber in longitudinal section. Figs. 3 and 4 are vertical cross sections on lines 33 and "ifi, respectively, of Fig. 2. Fig. 5 is an elevation similar to Fig. 1, illustrating a'n absorber of single form. Fig. 6 is a ldngitudinal section and Fig. 7 is an end view of the same, partly in section.

Referring to the drawings, each of the shock absorbing devices is here shown confiexible material, tubular and open at both ends, and formed integral therewith is bull-er head 3 which is shorter than the body with the opposite ends of the latter projecting beyond the butter head, as shown. Body 2 may be a composite of textile fabric and rubber, much like the outer casing of a. pneui matic tire, and butter 3 is preferably a solid block of resilient rubber.

Body 2 is confined within tubular casing 4- having a side opening 5 through which head 2 projects, the opening extending. to one end of easing 4 and with said end adapted to be closed by the caplike head 6. The opposite end 7 of the casing may be integral with the casing body as shown. With cap 6 removed the tubular body and its projecting bufi'er head may be-readily inserted, one end of the body entering end 7 of the casing with the opposite end confined by cap 6 when the latter is screwed on.

Fitting within the tubular body 2 is the inflatable tube 8 which is secured at one end by valve device 9 to cap 6. The tube closely fits within the body with the tube ends bearl ing against gaskets 1.0 and 11, respectively,

within opposite ends of the casing, thereby permanently holding the tube when 1ndated and preventing any portion thereoffrom bulging in such manner as to be torn or injured. With an adequate pressure of air within the tube, say seventy-five pounds to the square inch, more or less, according to the type of vehicle and load, all shocksor jars communicated to the butter head Q'are dissipated without injury either to the vehicle body or its springs. Flexible body 2 so held and confined by casing {that it cannot be injuriously strained or distorted. The casing does not in any manner interfere with the desired resilient action, the rounded edges 12 thereof permitting the buffer head 3 to compress and expand Without hindrance.

The absorber may be secured inposition by various means. In the adaptation'shown in Fig. 1., two opposed shock-absorbing devices of the same general construction are utilized, with thelower of the two devices provided with a, base plate 1.3 which is secured by clips 14 ofivehicle spring 15. The upper shock absorber may be secured. to plate 16, with bolts 17 depending from the \ehicle frame 18 adjustably secured-to said plate by nuts 19. By this means the shock.

absorber may be adjusted'relativel y to the ("ear space between the frame and spring, as n ill be understood. When two of the shock- :absorbing devices are utilized in Fig. 1, limiter blocks 3 thereof are preferably normally in engagement as shown.

in the adaptation shown in Fig. 5., a single shoot; alrasorbcr is utilized. being held in position in manner similar to the lower of the two d vices shown in Fig 3 1. Fig. 5 also illustrates an adaptation of the device designed for where the available space l'ietween the vehicle body and spring is limited. In this construction throuter cosing .24 and the flexible body 20 are preferably oval in crosssection, as shown in Fig. 7, with the butler head 3 projecting from a flat side of the bully. The transverse extent throng sobbing device may be used singly as in Fig.

5,,0r double as in Fig. .1, without departing from the invention.

I claim 1. A shock absorber comprising a resilient body, a buffer head shorter than the body and projecting therefrom with opposite ends of the body extending beyond the head, and a casin having an opening between its ends gwhich the buffer head extends with the ends of the body confined in the ends of the casing.

2; A shock absorber comprising a resilient body, a buffer head projecting from the body between the ends of the latter, and a casing having an opening through which the buffer head extends with the casing ends embracing the ends of the resilient body and with one of the .casing ends removable.

3. A shock absorber comprising a resilient body, a buffer head projecting from the body between the ends of the latter, a casing having an opening through which the butter head projects, the casing being open at one end with the buffer-head opening extending through said end and with the opposite end of the casing adapted to embrace one end of the resilient body, and a cap-like device for closing the open end of the casing and confining therein an end of the resilient body.

4. A shock absorber comprising a tubular flexible body open at its ends, a butter head romoting from the body, a tubular casing adapted to embrace the body and having an opening through which the butter head extends, a removable cap fitting and closing one end of the casing, and an inflatable tube fitting within the tubular body with the ends of the tube bearing against opposite ends of the casing.

5; A shock absorber comprising a tubular flexible body,,a body-inclosing casing open for subjecting the body to shocks, a removable head for the casing, and an inflatable.

tube secured to the head and adapted to be entered in the tubular body.

5. A shock absorber comprising a tubular flexible body, a butter head projecting from the body with the ends of the latter projecting beyond the head, a casin having an opening through which the butter head projcits, and an inflatable tube inserted within the body with opposite ends of the casing forming abutments for the tube ends and with the tube when inflated normally holding the butter head projected from the casing. v

7. A, shock absorber comprising a resilient body, a resilient bu Her head formed integral with and projfl'ting from the body between the ends of the-latter, and a rigid casing having end portions which embrace the ends of the body and with an opening in the casing between its ends through which the resilient butler head extends.

8. A shock absorber comprising a hollow lesilie t body, a non-hollow resilient butter 119th? formed integral with and projecting from the body between the ends of the latter, a casing having end portions which embrace the ends of the resilient body and having an opening between said ends through which the resilient bufl'er head extends, and means for maintaining air under pressure within the resilient body.

In testimon whereof I aflix my signature in presence 0 two witnesses.

JOSEPH BOLAND.

Witnesses J. M. Nnserr, F E. GAI'IHER. 

